<template>
  <div id="app-container">
    <!--查询表单-->
    <el-form :inline="true" class="demo-form-inline" style="margin-top: 20px;margin-left: 15px">
      <el-form-item>
        <el-input v-model="courseQuery.title" placeholder="课程名称"/>
      </el-form-item>

      <el-form-item>
        <el-select v-model="courseQuery.status" clearable placeholder="未发布">
          <el-option :value="'Draft'" label="未发布"/>
          <el-option :value="'Normal'" label="已发布"/>
        </el-select>
      </el-form-item>

      <el-form-item label="添加时间">
        <el-date-picker
          v-model="courseQuery.begin"
          type="datetime"
          placeholder="选择开始时间"
          value-format="yyyy-MM-dd HH:mm:ss"
          default-time="00:00:00"
        />
      </el-form-item>
      <el-form-item>
        <el-date-picker
          v-model="courseQuery.end"
          type="datetime"
          placeholder="选择截止时间"
          value-format="yyyy-MM-dd HH:mm:ss"
          default-time="00:00:00"
        />
      </el-form-item>

      <el-button type="primary" icon="el-icon-search" @click="getList()">查询</el-button>
      <el-button type="default" @click="resetData()">清空</el-button>
    </el-form>

    <!-- 表格 -->
    <el-table
      :data="list"
      border
      fit
      highlight-current-row>

      <el-table-column
        label="序号"
        width="70"
        align="center">
        <template slot-scope="scope">
          {{ (page - 1) * limit + scope.$index + 1 }}
        </template>
      </el-table-column>

      <el-table-column prop="title" align="center" label="课程名称"/>

      <el-table-column label="课程状态" align="center" width="80">
        <template slot-scope="scope">
          {{ scope.row.status === 'Draft' ? '未发布' : '已发布' }}
        </template>
      </el-table-column>

      <el-table-column prop="lessonNum" align="center" width="80" label="课时数"/>

      <el-table-column prop="gmtCreate" align="center" label="添加时间" />

      <el-table-column prop="gmtModified" align="center" label="更新时间"/>

      <el-table-column prop="viewCount" align="center" width="80" label="浏览数量"/>

      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <router-link :to="'/course/publish/'+scope.row.id">
            <el-button type="primary" size="mini" icon="el-icon-edit">修改</el-button>
          </router-link>
          <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 分页 -->
    <el-pagination
      background
      :current-page="page"
      :page-size="limit"
      :total="total"
      style="padding: 30px 0; text-align: center;"
      layout="total, prev, pager, next, jumper"
      @current-change="getList"
    />
  </div>
</template>

<script>

//引入调用teacher.js文件
import course from "../../../api/teacher/course";

export default {
  data() {//定义变量和初始值
    return {
      list: null,//查询之后接口返回集合
      page: 1,//当前页
      limit: 10,//每页记录数
      total: 0,//总记录数
      courseQuery: {} //条件封装对象
    }
  },
  created() {//页面渲染之前执行，一般调用methods定义的方法
    this.getList()
  },
  methods: {//创建具体的方法，调用teacher.js定义的方法
    getList(page = 1) {
      this.page = page
      course.getCourseListPage(this.page, this.limit, this.courseQuery)
        .then(response => {
          this.list = response.data.rows
          this.total = response.data.total
        })
    },
    resetData() {
      //清空表单数据
      this.courseQuery = {}
      //查询所有信息
      this.getList()
    },
    removeDataById(id){
      this.$confirm('此操作将永久删除该课程, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {
        //调用删除方法
        course.removeCourseInfo(id)
          .then(response => {
            this.$message({
              type: 'success',
              message: '删除成功!'
            });
            //刷新页面
            this.getList()
          })
      }).catch(() => {
        this.$message({
          type: 'info',
          message: '已取消删除'
        });
      });
    },
  }
}
</script>
